Buku Teks
Queensland : The University of Queensland Press, 1985
Majalah, Jurnal, Buletin
Aitkin, Don, author
Australian National University Press, 1978
Buku Teks
University of queensland press,
Majalah, Jurnal, Buletin
Killen, James, author
Port Melbourne, 1985
Buku Teks